title: 3-(4-Hy-droxy-phen-yl)-1,5-bis-(pyridin-2-yl)pentane-1,5-dione.
abstract: In the title mol-ecule, C21H18N2O3, the pyridine rings make a dihedral angle of 13.1 (1)°. The phenyl ring is approximately perpendicular to both of them, forming dihedral angles of 87.4 (1)and 81.9 (1)°. In the crystal, pairs of O-H⋯N hydrogen bonds link the mol-ecules into centrosymmetric dimers. Additional C-H⋯O, π-π [centroid-centroid distance = 3.971 (2) Å] and C-H⋯π inter-actions consolidate the dimers into a three-dimensional network.
authors.affiliation: State Key Laboratory of Non-Food Biomass and Enzyme Technology, National Engineering Research Center for Non-Food Biorefinery, Guangxi Key Laboratory of Biorefinery, Guangxi Academy of Sciences, Nanning, Guangxi 530007, People's Republic of China.
authors.forename: Lixia
authors.initials: L
authors.lastname: Pan
authors.forename: Huaduan
authors.initials: H
authors.lastname: Shi
authors.forename: Zhen
authors.initials: Z
authors.lastname: Ma